A systematic review of cross- vs. within- company cost estimation studies

摘要: OBJECTIVE - The objective of this paper is to determine under what circumstances individual organisations would be able rely on cross-company based estimation models. METHOD We performed a systematic review studies that compared predictions from crosscompany models with within-company analysis project data. RESULTS Ten papers and models, however, only seven the presented independent results. Of those seven, three found were as good four significantly worse than models. Experimental procedures used by differed making it impossible undertake formal meta-analysis main trend distinguishing study results was small single company data sets (i.e. <20 projects) leaveone-out cross-validation all model more accurate model. CONCLUSIONS are inconclusive. It clear some ill-served whereas others benefit. Further needed, but they must different bases or at least sets). In addition, experimenters need standardise their experimental enable meta-analysis.